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Self Priming Pumps
What is a self priming pump? Self priming pumps are a type of centrifugal pump designed with a priming chamber located ahead of the impeller. This allows it to draw water from sumps positioned below the pump. Once the self priming pump is initially primed, it can automatically re-prime itself during regular operation without any need for manual intervention.
Self priming pumps work by using a rotating impeller inside a large casing to move water or other fluids through centrifugal force. For closed-loop HVAC and cooling systems, where priming isn’t required, dedicated chilled water pumps are usually the better option.
Self priming pumps are particularly well-suited for fluid transfer and high-flow applications. While they typically have a single impeller, which can limit pressure, multi-stage versions are available to address this. These self priming water pumps are commonly used in areas such as water supply, sewage handling, agriculture, and and in the petrochemical industry. Centrifugal pumps are favoured for their ability to handle high flow rates, manage abrasive fluids, provide mixing capabilities, and offer a straightforward design.
Clean Water Self Priming Pumps
Self-priming pumps are commonly used for clean water and grey water supply, often drawing water from underground sources or storage tanks. They are available with multiple impellers, making them ideal for boosting water supply pressure, often alongside a pressure vessel for water pumps, and rain harvesting applications. These self prime pumps are also offered in stainless steel models with WRAS approval, ensuring suitability for drinking water applications. They can all be used for swimming pool water circulation. Where mains pressure needs a permanent lift across a whole building, pump booster sets are usually the better choice.
Self Priming Water Pumps for Waste
Self-priming pumps with a larger solids-handling capacity, often known as trash pumps, are commonly used in wastewater applications. They can draw water from wastewater or sewage tanks without being submerged in the liquid. These pumps can also be fitted with a built-in or external macerator to help reduce the risk of blockages. They are ideal for temporary setups or flood response, as only a hose or pipe needs to be placed in the water.
They are also a great choice for wastewater with high chemical content, as only limited parts of the pump come into contact with the liquid. It’s important to note that they are typically effective for lifting water up to a maximum height of 7 meters.
Self-Priming Positive Displacement Pump
Positive displacement pumps can be used for self priming, for example: Lobe pumps, progressive cavity pumps, diaphragm pumps, twin screw pumps, eccentric pumps and peristaltic pumps. The positive displacement pumps are typically used in hygienic and industrial applications or for liquid with a high viscosity. For further details on these pumps, see process pumps.
Key self priming pump features/what we can offer
- Automatic self priming lift of up to 7 metres
- Wide range of mechanical seal options to suit application
- WRAS Approved options available
- Standard range from 0 – 720m3/h
- Standard range from 0.25kW to 315kW
- Repairs and replacements
- Mechanical seals
- Pipework and filters
Applications
- Waste and grey water transfer
- Water transfer pumps
- Process pumps
- Dewatering
- Pressure boosting
- Rainwater harvesting
- Sewage transfer
Common self priming pump issues we can solve
Leaking mechanical seals/pumps
Cavitation/noisy pumps
Level control failure
Pumps that fail regularly
Let’s Talk Pressure, we understand that every facility has unique demands. speak with a system expert today and get a recommendation built around your environment.
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